Then, it separates its audio-video streams, individually fix the issues on both the streams and later adjoins them to generate a healthy playable MP4 video. The software thoroughly scans and only extract the contents of original MP4 video file, without editing the original file. You need to fix MP4 file on Mac OS X El Capitan to make it playable again, which you can do with the aid of Remo Repair MOV. Even, after that if you face the same issue, then the only thing which is responsible for abnormal behaviour of MP4 video is corruption. So, try to play MP4 video in compatible media player. You may face such vivid error messages if the media player is not supported.
Every time, when you try to open MP4 files on OS X 10.11, an error message pops up such as “File format not supported”, “Unexpected end of file”, etc. Sometimes, you may not be able to play your MP4 video files on Mac El Capitan.
